Consumers like predictable billing more than they care about getting the most bang for their buck and beancounters like sticky recurring revenue streams more than they care about maximizing the profit margins for every user.
Yeah, but he can't use his $200 subscription for the API.
That's limited to accessing the models through code/desktop/mobile.
And while I'm also using their subscriptions because of the cost savings vs direct access, having the subscription be considerably cheaper than the usage billing rings all sorts of alarm bells that it won't last.